Anchoring
Anchoring is the way an initial number — even an arbitrary or irrelevant one — pulls our later estimates toward it. Once an anchor is in mind we adjust away from it, but rarely far enough, so the first figure we hear quietly shapes the final judgment.
How does anchoring work?
Faced with uncertainty, we grab a starting value and adjust — but adjustment is effortful and stops early, leaving the estimate biased toward the anchor. The anchor also primes anchor-consistent information, making it feel more plausible than it should. Even numbers we know are random still tug.
The first number you hear quietly shapes the final judgment — even when you know it's irrelevant.
How do you use anchoring?
- Setting your own reservation price before you hear the other side’s number in a negotiation.
- Distrusting estimates that started from a quoted figure, list price, or first offer.
- Anchoring on purpose — the first credible number on the table shapes the whole range.
What does anchoring look like in practice?
People asked whether Gandhi died before or after age 144, then to estimate his actual age at death, guess higher than those first asked about age 35 — even though both anchors are obviously absurd. The number alone moved the answer.
Where does anchoring fail?
Anchoring is hard to fully resist even when you know about it, so “just ignore the number” rarely works. The stronger defence is to generate your own estimate first, from your own reasoning, before any external figure can set the anchor.
- Many anchors carry genuine information — a list price reflects the seller's knowledge — so discarding them wholesale discards data along with distortion.
- The pull weakens with domain expertise and familiar quantities; the model matters most exactly where you can estimate least.
- Convergence near a first number isn't proof of bias — sometimes the anchor was simply close to right.
The counter-model: Mr. Market — Anchoring warns that quoted numbers pull your judgment; Mr Market reframes quotes as moody offers you are free to ignore.
How do you apply anchoring, step by step?
- Before hearing anyone's number — price, estimate, offer — write your own from independent reasoning.
- When the external figure arrives, note the gap between it and yours.
- Ask what the other party knows that could justify their number.
- Adjust only for reasons you can state, not because the number sits there.
- If you had no prior estimate, delay the decision until you have built one.
The deeper point
Its practical sting is that whoever puts the first number on the table usually wins the range — so in any negotiation or estimate, the real leverage is deciding your own figure beforehand, so the other side’s anchor lands on a mind that’s already made up.
Frequently asked
- What is anchoring?
- A bias in which an initial number, even an irrelevant one, pulls later estimates toward it because we adjust away from it too little.
- Where does it show up?
- Negotiations, pricing, salary offers, and any estimate under uncertainty — the first figure mentioned tends to shape the final one.
- How do you defend against it?
- Decide your own number first, from your own reasoning, before hearing the other side’s figure — so their anchor lands on a mind that’s already made up.
Related
Keep reading
Optionality
Small bets with capped downside need only one winner to pay for all the misses.
See this alongside the other thinking tools of negotiation and persuasion & marketing.
Go deeper
The book behind this idea: Thinking, Fast and Slow by Daniel Kahneman. Hear the whole thing free — start an Audible trial and your first audiobook is on the house.
Read the full summary of Thinking, Fast and Slow →
More canonical picks:
- The Art of Thinking Clearly — Rolf Dobelli
- The Great Mental Models, Volume 1 — Shane Parrish
- Poor Charlie’s Almanack — Charlie Munger
- Super Thinking — Gabriel Weinberg & Lauren McCann
- Seeking Wisdom — Peter Bevelin
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Cite this page
ReadGlobe. (2026). Anchoring. https://readglobe.com/model/anchoring/
"Anchoring." ReadGlobe, 1 July 2026, readglobe.com/model/anchoring/.
Primary source: Wikipedia
Editorial synthesis © ReadGlobe 2026, drawing on the mental-models tradition (Charlie Munger, Farnam Street) and the primary sources for each model. · Last reviewed 2026-07-01.